Histochemical observations have been made, by the Hausler-Hansson method, on carbonic anhydrase activity in the embryonic retina of the chick, where the enzyme is localized in the pigmented epithelium and in the Müller cells. Whereas in Mammals (e.g. in the mouse) the adult-type distribution of the enzyme is reached only two weeks after birth, in the chick embryo the definitive localization is already reached at hatching. Carbonic anhydrase activity may indeed be considered a reliable biochemical index of Müller cell differentiation, possibly useful also in the study of retinal organization in vitro.
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Con il contributo del Ministero per i Beni e le Attività Culturali